A Wavelet Transform Applet for Interactive Learning

Schremmer, Claudia ; Esser, Christoph ; Kuhmünch, Christoph ; Effelsberg, Wolfgang

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URL: https://ub-madoc.bib.uni-mannheim.de/854
URN: urn:nbn:de:bsz:180-madoc-8546
Document Type: Working paper
Year of publication: 2001
The title of a journal, publication series: Technical report
Volume: 01-004
Place of publication: Mannheim
Publication language: English
Institution: School of Business Informatics and Mathematics > Sonstige - Fakultät für Wirtschaftsinformatik und Wirtschaftsmathematik
MADOC publication series: Veröffentlichungen der Fakultät für Mathematik und Informatik > Institut für Informatik > Technical Reports
Subject: 004 Computer science, internet
Subject headings (SWD): Computerunterstütztes Lernen , Wavelet , Bildverarbeitung
Keywords (English): Wavelet Transform , Image Processing , Interactive Learning , Didactic Aspects
Abstract: In recent years, new forms and techniques of teaching have appeared, based on the Internet and on multimedia applications. In the teleteaching Project Virtual University of the Upper Rhine Valley (VIROR), multimedia simulations and animations complement traditional teaching material. Lecturers use Java applets in their courses to explain complex structures. These are then stored in a multimedia database to enable asynchronous learning. The wavelet transform has become the most interesting new algorithm for still image compression. Yet, there are many parameters within a wavelet analysis and synthesis: choice of the wavelet filter bank, decomposition strategy, image boundary policy, quantization threshold, etc. We consider the wavelet transform to be a typical example of a complex, hard-to-understand algorithm that needs illustration by interactive multimedia. In this article, we present the didactic background and the implementation of a sample applet on the discrete wavelet transform, as taught in our multimedia course.
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